When working towards [verifying design repositories](https://gitlab.com/gitlab-org/gitlab/issues/32467), we found that the existing code is complex and not easily extensible. Some discovery was done in https://gitlab.com/gitlab-org/gitlab/issues/33624 that has led to a POC MR: https://gitlab.com/gitlab-org/gitlab/merge_requests/18886. This Epic is to cover the work to make it easier to add new data types for verification in future. It needs to be simple to: - register the new data type - schedule the item for verification - verify the item itself